PLEASE, someone help! 1. What is the equation of the line which includes points (1, 3) and (2, 8)?

Question

PLEASE, someone help! 1.  What is the equation of the line which includes points (1, 3) and (2, 8)?

anonymous · Answer

$$m=y _{2}-y _{1}/x _{2}-x_{1}=8-3/2-1=5$$

anonymous · Answer

You basically use Y2 - Y1/ X2 - X1 to get the slope. That case it'll be 5/1 so the slope will be 5. Then it's y = mx + b. You already know that the slope is 5 so it will be y = 5x + b. Then you plug in one of those points to find the y intercept. 

8-3 / 2 - 1 = 5
Y = 5x + b, plug in (2,8)
8 = 5(2) + b
8 - 10 = b
b = -2

therefore y = 5x - 2

anonymous · Answer

then use any point in
$$y-y_{1}=m(x-x _{1})$$

anonymous · Answer

ie
$$y-3=5(x-1)$$
then solve

anonymous · Answer

thats correct do you understand the logic